Portable cooler



FIG. 1 is a perspective view of the portable cooler showing my new design;

FIG. 2 is an enlarged front elevational view thereof the rear being a mirror image;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is an end view thereof;

FIG. 6 is an end elevational view of a second embodiment thereof, the undisclosed sides being similar to those shown for the first embodiment; and

FIG. 7 is an end elevational view of a third embodiment thereof, the undisclosed sides being similar to those shown for the first embodiment. 

The ornamental design for a portable cooler, substantially as shown and described. 